The ideal microwave for an RV is a compact model between 0.5 and 0.9 cubic feet, designed to fit standard RV countertop or built-in spaces. Most RVs accommodate microwaves about 17 to 21 inches wide, 10 to 12 inches tall, and 12 to 15 inches deep, but you must measure your specific cutout before purchasing.

Quick Answer

For RV microwaves, size is the top concern. Compact microwaves (0.5–0.9 cu ft) fit most RVs, but always measure your cutout. Consider wattage (700–1000W), venting needs, and mounting type (countertop vs. built-in).

  • Microwave size range: Most RVs use compact microwaves from 0.5 to 0.9 cubic feet.
  • Standard RV cutout dimensions: Typical cutout: 17–21 inches wide, 10–12 inches tall, 12–15 inches deep.
  • Wattage for RV microwaves: Look for 700–1000 watts; higher wattage cooks faster but draws more power.
  • Built-in vs. countertop: Built-in models require a trim kit and proper ventilation; countertop models are simpler but take up space.

Measure Your RV Microwave Cutout

Before shopping, measure the width, height, and depth of your existing microwave opening. Use a tape measure and record dimensions in inches. Include any trim or bezel that might reduce usable space. Most RV cutouts are designed for compact microwaves, but sizes vary by manufacturer.

Common measurements: width 17–21 inches, height 10–12 inches, depth 12–15 inches. Some older RVs may have smaller openings. Always measure your specific unit—don’t rely on your RV model number alone, as manufacturers sometimes change specs.

Choose the Right Capacity and Wattage

RV microwaves typically range from 0.5 to 0.9 cubic feet. A 0.7 cu ft model is a popular middle ground—big enough for a dinner plate but small enough to fit most cutouts. For wattage, 700 to 900 watts is common. Higher wattage (900–1000W) heats faster but may trip breakers on low-amp circuits. Check your RV’s electrical system: most RVs have 15- or 20-amp circuits, so a 700–800W microwave is safer.

If you often cook larger dishes, consider a 0.9 cu ft model (around 900W). But verify that your RV’s power can handle it—running the microwave simultaneously with an air conditioner may cause issues.

Decide Between Countertop and Built-In

Countertop microwaves are easier to install and replace—just place on a shelf or counter. They typically have a standard plug and require no trim kit. However, they take up valuable counter space and may not look as integrated.

Built-in models are designed to slide into a cabinet or wall cutout. They often require a trim kit (sold separately) and proper ventilation (usually front-venting). Some built-in microwaves have a mounting bracket or require screws. Check if your RV has a pre-wired outlet inside the cutout. Built-in units look cleaner but are harder to swap.

Consider Ventilation and Trim Kits

RV microwaves need adequate ventilation to prevent overheating. Most compact microwaves vent from the sides or back, so leave at least 2–3 inches of clearance around the unit if it’s enclosed. Some built-in models have front vents—ideal for tight spaces.

Trim kits fill gaps between the microwave and the cutout. They are specific to certain brands (e.g., GE, Samsung) and can cost extra. Measure the exact cutout and match the trim kit part number to your microwave model. If you skip the trim kit, the microwave may not stay secure during travel.

Install Your RV Microwave Correctly

  1. Unplug the old microwave and remove any screws or brackets holding it in place.
  2. Slide out the old unit. Clean the cutout area.
  3. If installing a built-in, attach the trim kit to the microwave according to the instructions.
  4. Slide the new microwave into the cutout. Ensure it sits flush and level.
  5. Secure with screws through the cabinet frame or mounting bracket. For countertop models, simply place on a stable surface.
  6. Plug into the outlet. Test with a cup of water for 30 seconds.
  7. If the microwave vibrates excessively while driving, add rubber padding or a strap to hold it in place.

Pro Tips

  • Look for microwaves with a ‘travel lock’ or child lock feature to prevent accidental activation on the road.
  • Choose a model with a removable glass turntable for easy cleaning—crumbs and spills are common in RVs.
  • If your RV has a built-in inverter, a 900W microwave may be fine; check inverter capacity.
  • For boondocking, consider a low-wattage microwave (600–700W) to conserve battery power.

Common Mistakes to Avoid

  • Buying a microwave without measuring the cutout first—many RVs have non-standard sizes.
  • Forgetting to check the circuit breaker rating—a 1000W microwave can trip a 15-amp circuit.
  • Assuming all compact microwaves fit—even within the same cubic footage, external dimensions vary.
  • Neglecting ventilation: enclosing a microwave without clearance can cause overheating and failure.

FAQ

Can I use a regular home microwave in my RV?

You can, but it’s risky. Home microwaves are larger and may not fit the cutout. They also draw more power (1000–1200W), which can overload RV circuits. Stick to compact RV-specific models.

What is the smallest microwave for an RV?

The smallest common RV microwave is 0.5 cubic feet, about 15 inches wide, 10 inches tall, and 12 inches deep. These are ideal for small campers but may not fit a standard dinner plate.

Do I need a special microwave for an RV?

Not necessarily, but you need one that fits the cutout and can handle vibration during travel. Many owners use household compact microwaves successfully, but built-in RV models often have better mounting options.

The Bottom Line

Selecting the right size microwave for your RV comes down to accurate measurements, power compatibility, and mounting preference. Always measure your cutout, check your electrical system, and decide between countertop or built-in. With the right compact microwave, you’ll enjoy convenient cooking on the road without hassle.

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